Adaptive transient load switching for a low-dropout regulator

a transient load and regulator technology, applied in the direction of electric variable regulation, process and machine control, instruments, etc., to achieve the effect of increasing speed, reducing output current, and increasing speed

Inactive Publication Date: 2013-05-16
DIALOG SEMICONDUCTOR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0006]Embodiments include an LDO regulator having a switch configured to generate an output current, and a first sensing module that is configured to increase the speed at which the switch is turned off and the output current is decreased in response to detecting ...

Problems solved by technology

But as the load demands of portable electronic devices increase, LDO regulators strain to ...

Method used

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  • Adaptive transient load switching for a low-dropout regulator
  • Adaptive transient load switching for a low-dropout regulator
  • Adaptive transient load switching for a low-dropout regulator

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Embodiment Construction

[0012]The Figures (FIGS.) and the following description relate to preferred embodiments of the present disclosure by way of illustration only. It should be noted that from the following discussion, alternative embodiments of the structures and methods disclosed herein will be readily recognized as viable alternatives that may be employed without departing from the principles of the present disclosure.

[0013]Reference will now be made in detail to several embodiments of the present disclosure, examples of which are illustrated in the accompanying figures. It is noted that wherever practicable similar or like reference numbers may be used in the figures and may indicate similar or like functionality. The figures depict embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the ...

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Abstract

A low-dropout (LDO) voltage regulator includes a switch to generate an output current, and a first sensing module that increases the speed at which the switch is turned off and the output current is decreased in response to detecting a decreasing load current. The LDO regulator further includes a second sensing module that increases the speed at which the switch is turned on and the output current is increased in response to detecting an increasing load current.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority under 35 U.S.C. §119(e) from co-pending U.S. Provisional Patent Application No. 61 / 560,769, filed on Nov. 16, 2011, which is incorporated by reference herein in its entirety.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to a low-dropout (LDO) regulator, and more specifically relates to LDO regulator output switching.[0004]2. Description of the Related Arts[0005]Fueled by the growth of feature-rich portable electronic devices, demand for more efficient low-voltage regulator devices continues to grow. To help regulate voltages within portable electronic devices, designers often use LDO regulators. LDO regulators generally operate at a lower minimum operating voltage and low quiescent current compared to other types of voltage regulators. But as the load demands of portable electronic devices increase, LDO regulators strain to adequately regulate low voltage output during conditions of...

Claims

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Application Information

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IPC IPC(8): G05F1/10
CPCG05F1/10G05F1/575
Inventor LO, PING
Owner DIALOG SEMICONDUCTOR INC
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